Amazon is releasing four new products to make your speaker system way smarter — including a subwoofer

Amazon just announced the addition of four new audio products in its Echo lineup.

The Echo Input gives you Alexa control by connecting to a non-echo speaker through an auxiliary cord or bluetooth.

The Echo Link connects to a receiver or amplifier, and lets you control music selection, volume, and multi-room playback through Alexa.

The Echo Link Amp has the same functionality of the Link, but includes a built-in amplifier.

The Echo Sub adds a subwoofer to the Echo lineup, and can be paired with two Echos for a 2.1 stereo sound system.

Amazon just announced four new audio products meant to enhance the home listening experience of Echo and Alexa users.

First up is the $129.99 Echo Sub, a subwoofer that will give some extra bass to an Echo speaker system and can be paired with two Echos to create a 2.1 stereo speaker setup.

The $199 Echo Link connects to a receiver or amplifier through digital or analog inputs, and lets you control music selection, volume, and multi-room playback through Alexa. The $299.99 Echo Link Amp has the same functionality as the Link, but has a built-in 60W 2-channel amplifier.

For those with non-Amazon or non-Alexa compatible speakers, the $34.99 Echo Input gives you Alexa control over non-Echo speakers — it can be connected to any speaker through Bluetooth or an auxiliary cable, allowing you to use voice commands with the device.